1. This standard establishes the rolled thread element tolerances for lead, half-angle, taper, andout-of-roundness for studs used in aerospace construction; it also establishes the requirements forlead threads and runout threads for these studs.2. This standard defines the requirements for runout threads and lead threads for bolt and screw rolledthreads used in aerospace construction; it also specifies a referee method, by optical projection, forestablishing conformity with these requirements which agree with ISO 3353.3 .The bolt and screw lead and runout thread requirements are also applicable to other externallythreaded products where the threads are produced by rolling.